低水头有压竖式进水口体型设计与模型试验研究

Research on the Model Design and Model Test of Low Water Head Pressure Vertical Inlet

以车马碧水库工程泄洪放空隧洞进水口的设计过程为例,研究了低水头情况下有压竖式进水口布置的可行性,对多组不同体型的进水口及消涡设施组合进行了模型试验验证。通过建立合理的试验模型,分析各方案竖式进水口的流态、泄流能力及沿程压力分布,最终得到既能有效控制进水口立轴旋涡、流态稳定、节省工程投资又易于施工的结构布置方案。研究过程可为其他工程低水头有压竖式进水口的体型设计、消涡设施设计提供思路和参考。

Taking the design process of the inlet of the flood-discharging tunnel of the Chemabi Reservoir Project as an example,this paper studies the feasibility of the arrangement of the pressure vertical inlet in the case of low head,and analyses the model test and verification of the inlet and vortex of multiple sets of different body types.By establishing a reasonable test model,the flow state,discharge capacity and pressure distribution along the vertical inlet of each scheme are analyzed.Thus,a structural arrangement scheme can be obtained which can effectively control the vertical vortex of the water inlet,the flow stability with lower engineering costs and easier construction process.The research process can serves as a reference for the design of the body type and the vortex-reducing device for the low-headed pressure vertical inlet of other projects.